The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2010
Filed:
May. 26, 2006
Mario Ricco, Casamassima, IT;
Raffaele Ricco, Valenzano, IT;
Annunziata Satriano, Valenzano, IT;
Sergio Stucchi, Valenzano, IT;
Onofrio DE Michele, Valenzano, IT;
Mario Ricco, Casamassima, IT;
Raffaele Ricco, Valenzano, IT;
Annunziata Satriano, Valenzano, IT;
Sergio Stucchi, Valenzano, IT;
Onofrio De Michele, Valenzano, IT;
Abstract
A servo valve () for fuel control is provided with an actuator () and a valve body (), which is set in a fixed position and has a stem () that extends along a longitudinal axis () and defines an internal passage (); said internal passage () has at least two radial channels (), which give out into an outlet through an outer lateral surface () of the stem () and have respective first portions () of calibrated length and cross section; said first portions () are followed by respective second portions of larger diameter; the servo valve () is provided with an open/close element (), which is coupled to the outer lateral surface () of the stem () substantially in a fluid-tight way and is axially movable under the action of the actuator () for opening/closing the internal passage () of the stem (); in the closing position, the open/close element () is subject to a zero axial resultant force by the pressure of the fuel.